Yeah, there was one letter I really like (and still kind of desperately hope to get assigned to) that misspelled my favourite character's name. It's a common misspelling of that name and not a big deal, but I still kind of winced because, between the typo and the way she was only mentioned offhand in one parenthetical in the middle of an "any" request, it suggests that the letter writer probably really doesn't care about her all that much.